How many moles of water are produced if 5.43 mol pbo2 are consumed?10.9

The correct answer is 10.86 moles.

It is a stoichiometry based problem,  

One can solve this by just knowing the balanced chemical equation. The reaction where PbO2 is used and water is generated is:  

Pb + PbO₂ + 2H₂SO₄ → 2PbSO₄ + 2H₂O

The mentioned reaction is witnessed in the lead storage battery.  

Therefore, here as per the balanced equation one mole of PbO₂ is consumed providing two moles of water. So, for 5.43 moles of PbO₂, we will get,  

2 × 5.43 moles of water = 10.86 moles.  

the correct answer is 10.9

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error